Chemical Equilibrium Lab Report

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Chemical Equilibrium Lab Report Aim: The aim of the lab “Chemical Equilibrium” is to observe the effects of changes in concentrations of products and reactants on the position of the equilibrium of given chemical reactions. Background Information: We are going to use our knowledge of the Le Chatelier’s principle in order to observe this experiment. The principle states that the equilibrium will shift in the direction that will minimize the effects of the change. This lab consists of two parts. [Part 1] Procedure: The solutions that we used were: * 5 ml of 0.1 mol dm-3 of FeCl3 * 5 ml of 0.1 mol dm-3 of KSCN 1. We mixed these two solutions in a 100ml beaker. 2. We added distilled water into the solution…show more content…
6. We added 1.0 mol dm-3 of NaOH into tube #7 until a change in color is observed. 7. We added 1.0 mol dm-3 of NaOH into tube #8 and than added 1.0 mold dm-3 of mold dm-3 HCl until a change in color is observed. Qualitative Data Tube Number | #5 | #6 | #7 | #8 | Initial Color | Yellow | Yellow | Orange | Orange | Substance(s) added | 1.0moldm-3 HCl | 1.0moldm-3 HCl and 1.0moldm-3 NaOH | 1.0moldm-3 NaOH | 1.0moldm-3 NaOH and 1.0moldm-3 HCl | First Color Change | Orange | Orange | Yellow | Yellow | Second Color Change | Orange | Yellow | Yellow | Orange | Conclusion: To conclude, the data we have collected from both experiments suggests that Le Chatelier’s principles are applicable and correct. When different substances were added to different solutions, the equilibrium shifted appropriately in order to gain a balance. The shifting of equilibrium resulted in different color changes in different mixtures. In part 2 of the experiment we the aforementioned changes were more easily spotted. We saw the relationship between forward and reverse reactions. When NaOH was added to tube #8 we saw that the color changed from orange into yellow, in order to gain balance but when we added HCl back, the color again changed to orange. Which clearly proved Le Chatelier’s
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